EP3291669B1 - Antenna apparatus - Google Patents
Antenna apparatus Download PDFInfo
- Publication number
- EP3291669B1 EP3291669B1 EP16788954.2A EP16788954A EP3291669B1 EP 3291669 B1 EP3291669 B1 EP 3291669B1 EP 16788954 A EP16788954 A EP 16788954A EP 3291669 B1 EP3291669 B1 EP 3291669B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- angled
- panels
- coils
- animals
- animal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
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- 239000004033 plastic Substances 0.000 claims description 22
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- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000005452 bending Methods 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 241001494479 Pecora Species 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 210000002683 foot Anatomy 0.000 description 2
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- 241000272525 Anas platyrhynchos Species 0.000 description 1
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- 239000002253 acid Substances 0.000 description 1
- 210000003423 ankle Anatomy 0.000 description 1
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- 239000003814 drug Substances 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 244000144992 flock Species 0.000 description 1
- 210000000003 hoof Anatomy 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000000366 juvenile effect Effects 0.000 description 1
- 244000144972 livestock Species 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
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- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
- H01Q1/2216—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in interrogator/reader equipment
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K1/00—Housing animals; Equipment therefor
- A01K1/06—Devices for fastening animals, e.g. halters, toggles, neck-bars or chain fastenings
- A01K1/0613—Devices for immobilisation or restraint of animals, e.g. chutes
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K11/00—Marking of animals
- A01K11/006—Automatic identification systems for animals, e.g. electronic devices, transponders for animals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/02—Refracting or diffracting devices, e.g. lens, prism
- H01Q15/04—Refracting or diffracting devices, e.g. lens, prism comprising wave-guiding channel or channels bounded by effective conductive surfaces substantially perpendicular to the electric vector of the wave, e.g. parallel-plate waveguide lens
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
- H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
Definitions
- This invention generally relates to an antenna apparatus for identifying farm animals proceeding through a race.
- Low frequency RFID devices may be used to identify farm animals.
- the RFID device is interrogated (read) by a suitable reader that incorporates an antenna.
- a further problem that can occur in animal identification systems is that two or more animals' heads, and therefore also their tags, may enter or be present in a read zone of an antenna at the same time. This can cause a tag collision and may result in one or more tags not being read. This can occur when animals follow each other too closely or when animals do not move through the reader in single file, and is especially a problem with a mixture of different sized animals.
- the present invention may provide an improved antenna apparatus, or may at least provide the public with a useful choice.
- WO 2004/026025 A1 describes an antenna system for the detection of livestock.
- WO 2007/033407 A1 describes a portal antenna for reading devices carried by animals proceeding through a stock race.
- NIC Pluth et al 3.56 MHz RFID Power System
- a Helmholtz antenna describes an RF power system including a Helmholtz antenna.
- US 5175419 A describes an identification method using a magnetic marker passing through an alternation magnetic field.
- GB 1292380 describes an electronic surveillance system which uses interrogation of passive labels.
- US 4134538 A describes an approach for identifying objects using a magnetic band passing through a detection zone.
- FIG. 1 shows a block diagram of an antenna apparatus 1.
- the antenna apparatus 1 includes a reader 2 and a controller 3.
- the reader 2 and controller 3 are connected by a reader interface 4.
- Antenna apparatus 1 may be attached to additional devices 5 through additional interfaces 6.
- the antenna apparatus 1 is provided within a stock race 301 and connected to controller 3 through reader interface 4. Animals may be collected in a yard, with each having an identification device or tag affixed, usually to the ear, within the rumen, or to an ankle band or other such fitting. Each animal travels a path 201 through a detection space in single file. The space above the antenna apparatus 1 is unobstructed, which minimises animals baulking or slowing as they go through. The open top also allows an operator to walk through stock race 301 easily without needing to climb out of the race 301 or to duck underneath. The antenna apparatus 1 may thus be more efficient and/or more convenient.
- the antenna apparatus 1 includes a left coil 202 and a right coil 203. These coils 202, 203 are preferably in parallel planes and may be co-axial.
- a controller 3 energises each of these coils 202, 203 with an electric current to generate a magnetic field.
- the tag includes a passive RFID device, which absorbs enough energy while passing the field to radiate an identification signal.
- the identification signal is detected by the coils 202, 203 and passed to the controller 3.
- the controller receives and may interpret or decode the identification signal.
- the controller 3 registers the identity of the animal and records it into a database. A timestamp may also be recorded for each animal.
- This data may be used to log which animals have been treated with medicaments, to count the number of animals in a flock, and/or may be used in conjunction with in race weigh scales. The data may also be used to help fulfil governmental regulations in reporting animal movements.
- An example of an in-race tag detection system is disclosed in US patent number 8,154,465 .
- the structure of the antenna apparatus 1 is substantially U shaped including a base panel 204, a left angled panel 205, a right angled panel 206, a left side panel 207 and a right side panel 208.
- the right side panel 208 extends from the right angled panel 206, and both panels are slanted.
- the left side panel 207 extends from the left angled panel 205, and both panels are slanted.
- An animal 402 eg: sheep is shown passing through the reader 2. Typically the animals may be between 30 centimetres and 100 centimetres in height.
- side panels 207, 208 are as tall as or taller than the animals being measured. However, accurate tag reading may still be possible when the side panels 207, 208 do not reach as high as the height of the animals, as the magnetic field may continue above the height of the side panel. For example the side panels 207, 208 may reach a vertical height of 90 centimetres above the ground when the reader 2 is installed in a stock race.
- the base panel 204 lies flat on the dirt floor of the stock race 301, and may be 165mm in width when measured along its front edge.
- the side panels 207, 208 may be attached to the stock races 301, 401 by bolts. These bolts may pass through the side panels 207, 208 in approved locations.
- the reader 2 may have a side bracket to hook onto the rail of the race 301.
- FIG. 5 An example of the magnetic field 501 is shown in Figure 5 .
- the left coil 202 is driven to create a magnetic field with the same magnitude and frequency as the right coil 203, such that magnetic fields generated by the left coil 202 and the right coil 203 reinforce each other in the area between the coils 202, 203 eg: in phase.
- the shape and length of the coils 202, 203 may depend on the size of the animals that will use the antenna apparatus 1 and the location of the identification device. While the magnetic field is concentrated within the boundaries of the antenna apparatus 1, the field will extend beyond the boundaries.
- the left coil 202 and the right coil 203 create a field which covers the height of the head of an animal passing through the antenna apparatus 1, but as the animal can place its head at a range of heights as it travels through the antenna apparatus 1, the field is made large enough to cover this movement accounting for different sized mature and juvenile animals.
- the space in which an RFID tag can be read in is called the read zone 503.
- read zone 503. When two or more RFID tags enter or are present in the read zone simultaneously, read errors can occur.
- RFID tags are attached through the ears of each animal. Thus in prior art readers with vertical orientation, multiple animals are sometimes able to jamb their heads in the reader at the same time and cause a read error.
- the angled panels 205, 206 restrict the passage enough to ensure that all animals are in single file.
- the angled panels 205, 206 may be around 330mm in length when measured along their front edge, and may be angled at between 20°-60° from vertical, for example, 30° with respect to vertical, such that the distance between the side panels 207, 208 is around 450mm.
- the left side panels 207, 208 may be slanted to ensure that the animals are forced into single file (by way of the angled panels 205, 206 at the bottom) before passing through the magnetic field (near the top), as shown looking from the side in Figure 4 .
- the angled panels 205, 206 may also be slanted. In other words at least one foot of the animal is within the structure (and thereby forced into single file) before the tag reaches the magnetic field.
- the side panels 207, 208 may be slanted looking from the side at between 20°-60° from vertical. For example, this slant may be 30° from vertical.
- the identification device may be on the animal's ear (e.g. an RFID ear tag)
- the antenna apparatus 1 may be reconfigured for other locations on the animal. For example if the identification device is lower on the animal the side panels 207, 208 may be slanted in the opposite direction and the angled panels 205, 206 may be provided at the top.
- the angled panels 205, 206 may also be designed to avoid small animals passing through at the same time as larger animals eg: a lamb underneath the mother.
- the "U” shape may also be described as a "V” shape or a truncated “V” shape or a frustoconical shape.
- the antenna apparatus 1 may be manufactured as shown in Figures 6 and 7 .
- a method of manufacturing 601 includes forming 602 a plastic blank 702. Then the electrical coils are wound 603 around formers in the plastic blank 702. The plastic blank 702 is then shaped 604. The shaped structure is then electrically connected to the controller 2 and packaged 605.
- the forming 602 may relate to milling a flat plastic block 701 into a desired shape and profile features in order to create the plastic blank 702 shown in Figure 7 .
- manufacturing techniques such as injection moulding, 3D printing, or fabrication may be used according to the requirements of the application.
- the plastic blank 702 may be constructed in sections which are then adhered or bonded together.
- the plastic blank 702 may be polyvinyl chloride (PVC) plastic, with a thickness of 15-21mm. Thicknesses outside this range may also be used, however the panels of the plastic blank 702 should be strong enough to withstand animal hoofs walking on them. Other construction materials may be used, including other types of plastics and timber. Milling may be performed using a computer numerical control (CNC) router. Several offset or opposed plastic blanks may be milled from a single sheet of material, in order to reduce wastage from offcuts 703. The plastic blank 702 may be made with a honeycomb structure 704 to reduce the weight of the resulting reader 2 by around 30%. The colour of the plastic blank 702 may be chosen to camouflage against the surroundings of the stock race 301.
- PVC polyvinyl chloride
- CNC computer numerical control
- Camouflaged anti-slip floor tape can be used when the reader 2 is on a dirt floor. Alternately, the bottom of the reader 2 may be slightly buried within the floors of the stock race 301 by a few centimetres.
- Winding 603 may involve winding or securing the left coil 202 in left coil groove 705, and winding or securing the right coil 203 in right coil groove 706.
- the coils 202, 203 may be wound in an oval shape, trapezoid or circular shape. While the coil shapes may vary, the impedance of the coils 202, 203 should be maintained so that the reader 2 stays within the specification of the TX/RX input stage of the controller 3 in order to provide adequate impedance matching.
- the resistance of the coils 202, 203 may be varied in order to change the Quality Factor (Q) of the reader 2.
- the coils 202, 203 are made from Litz wire, a PCB track, a solid strand conductor or from some other conductor type.
- the coils 202, 203 may be wound using a winding machine or may be separately wound onto a former which is then attached to the plastic blank 702.
- the coils 202, 203 may then be secured using silicon rubber. Ferrite tiles may be used to further direct the electromagnetic field. Tuning capacitors, filters and EMI shielding may also be added. At this point the plastic blank 702 is still substantially flat.
- Shaping 604 may involve bending at various places in the plastic blank 702 to create the U shape.
- the bend lines 707 are heated at around 120°C for around 15-30 minutes prior to bending.
- An electronic strip heater, a hot air strip heater or a gas heater may be used for heating.
- the bend lines 707 are then folded in the desired shape using a jig on which the plastic blank 702 is placed when it is hot enough to bend. Pressure is applied to the hot plastic in order to bend it to the desired angle, and held until the piece is cooled to below 50°C. Water or wet cooling rags may be used to speed up the cooling process.
- bend lines 707 in Figure 7 four lateral bends are made in the substantially flat structure. By maintaining accurate temperature control and even temperature distribution, burning and spotting of the piece may be avoided.
- Connecting and packaging 605 may involve bonding a cover over the coils 202, 203 (this may also be done prior to forming). It may include terminating the coils 202, 203 to an electrical circuit or to an electrical connector. This may include a plug and cabling to the controller 3.
- a box may be attached to the outside of the reader 2 to accommodate additional reader electronics.
- the coils 202, 203 may be terminated to an electrical connector.
- the electrical connector may be partially recessed into the reader 2.
- coil winding leads may exit a panel and be attached to an electrical plug.
- the coil winding leads may be protected by a conduit or a flexible tube. The bonding process ensures that the antenna apparatus 1 is sealed and water resistant eg: IP56 rated.
- the pieces of plastic being bonded may be plasticized and then completely mixed together in order to bond entirely. Silicon may be used around connectors to ensure there is no water ingress around cable entry points.
- the antenna apparatus 1 may be able to be chemically treated by disinfectant for bio-security purposes.
- the controller 3 may be connected to a 12V power supply, such as a vehicle lead acid battery.
- the controller may be mounted to the stock races 301, 401 using screws or a supplied bracket.
- the antenna apparatus 1 may be an active reader and may use the coils 202, 203 for energizing the RFID tag as well as for receiving signals from the RFID tag.
- the RFID tag may modulate the excitation signal in a full duplex methodology (FDX). Alternately, the RFID tag may store energy and/or data from the excitation signal in order to send a response at the appropriate time in a half-duplex methodology (HDX).
- the controller may store a unique ID from an RFID tag and may also store a timestamp.
- the antenna apparatus may be tuned or optimized to work with a number of RFID readers.
- the antenna apparatus 1 Due to the shape of the antenna apparatus 1 it may be easy to install into a standard non-metallic sheep race. By using the same reader interface 4 as presently available controllers use, installation is further simplified.
- the antenna apparatus 1 may also have a standard serial I/O port as part of the additional interfaces 6. This may use open source protocols to promote integration with various software packages and additional devices 5, such as scales and data loggers.
- the reader 2 may be wound and/or tuned according to a winding specification.
- the reader 2 may have an impedance of 100 ⁇ H to 120 ⁇ H, or between 200 ⁇ H and 980 ⁇ H depending on the controller 3 used.
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Zoology (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Birds (AREA)
- Radar Systems Or Details Thereof (AREA)
- Near-Field Transmission Systems (AREA)
- Details Of Aerials (AREA)
Description
- This invention generally relates to an antenna apparatus for identifying farm animals proceeding through a race.
- Low frequency RFID devices may be used to identify farm animals. The RFID device is interrogated (read) by a suitable reader that incorporates an antenna.
- A number of problems can arise where the interrogation occurs as animals move through a stock race. Animals may baulk upon seeing a tag reader above the race, and may hesitate, run backwards, or jump out of the race. As well as causing race inefficiency, the animals may be hurt or undesirably stressed by this process.
- A further problem that can occur in animal identification systems is that two or more animals' heads, and therefore also their tags, may enter or be present in a read zone of an antenna at the same time. This can cause a tag collision and may result in one or more tags not being read. This can occur when animals follow each other too closely or when animals do not move through the reader in single file, and is especially a problem with a mixture of different sized animals.
- The present invention may provide an improved antenna apparatus, or may at least provide the public with a useful choice.
-
WO 2004/026025 A1 describes an antenna system for the detection of livestock. -
WO 2007/033407 A1 describes a portal antenna for reading devices carried by animals proceeding through a stock race. - Darren Pluth et al "3.56 MHz RFID Power System" describes an RF power system including a Helmholtz antenna.
-
US 5175419 A describes an identification method using a magnetic marker passing through an alternation magnetic field. -
GB 1292380 -
US 4134538 A describes an approach for identifying objects using a magnetic band passing through a detection zone. - According to an embodiment, there is provided an apparatus according to
claim 1. - According to a further embodiment, there is provided a method of manufacturing according to claim 10. Reference to any document in this specification does not constitute an admission that that document is prior art, is validly combinable with any other document or that it forms part of the common general knowledge.
- The accompanying drawings which are incorporated in and constitute part of the specification, illustrate embodiments of the invention and, together with the general description of the invention given above, and the detailed description of embodiments given below, serve to explain the principles of the invention, in which:
- Figure 1
- is a block diagram of an antenna apparatus according to an example embodiment;
- Figure 2
- is a perspective view of the antenna apparatus;
- Figure 3
- is a perspective view of the antenna apparatus in the stock race;
- Figure 4
- is a side view of the antenna apparatus in the stock race;
- Figure 5
- is a graph of the magnetic field;
- Figure 6
- is a flow diagram of a method of manufacturing; and
- Figure 7
- is a plan view of a plastic blank during manufacturing.
-
Figure 1 shows a block diagram of anantenna apparatus 1. Theantenna apparatus 1 includes areader 2 and acontroller 3. Thereader 2 andcontroller 3 are connected by areader interface 4.Antenna apparatus 1 may be attached toadditional devices 5 through additional interfaces 6. - An example implementation is shown in
Figures 2 to 4 . Theantenna apparatus 1 is provided within astock race 301 and connected tocontroller 3 throughreader interface 4. Animals may be collected in a yard, with each having an identification device or tag affixed, usually to the ear, within the rumen, or to an ankle band or other such fitting. Each animal travels apath 201 through a detection space in single file. The space above theantenna apparatus 1 is unobstructed, which minimises animals baulking or slowing as they go through. The open top also allows an operator to walk throughstock race 301 easily without needing to climb out of therace 301 or to duck underneath. Theantenna apparatus 1 may thus be more efficient and/or more convenient. - The
antenna apparatus 1 includes aleft coil 202 and aright coil 203. Thesecoils controller 3 energises each of thesecoils coils controller 3. The controller receives and may interpret or decode the identification signal. Thecontroller 3 then registers the identity of the animal and records it into a database. A timestamp may also be recorded for each animal. This data may be used to log which animals have been treated with medicaments, to count the number of animals in a flock, and/or may be used in conjunction with in race weigh scales. The data may also be used to help fulfil governmental regulations in reporting animal movements. An example of an in-race tag detection system is disclosed inUS patent number 8,154,465 . - Looking from the front, or down the race, as in
Figure 3 , the structure of theantenna apparatus 1 is substantially U shaped including abase panel 204, a leftangled panel 205, a rightangled panel 206, aleft side panel 207 and aright side panel 208. Looking from the side, as inFigure 4 , theright side panel 208 extends from the rightangled panel 206, and both panels are slanted. Similarly, theleft side panel 207 extends from the leftangled panel 205, and both panels are slanted. Ananimal 402 eg: sheep is shown passing through thereader 2. Typically the animals may be between 30 centimetres and 100 centimetres in height. In some cases,side panels side panels side panels reader 2 is installed in a stock race. - The
base panel 204 lies flat on the dirt floor of thestock race 301, and may be 165mm in width when measured along its front edge. In the case of permanent installations, theside panels side panels reader 2 may have a side bracket to hook onto the rail of therace 301. - An example of the
magnetic field 501 is shown inFigure 5 . Theleft coil 202 is driven to create a magnetic field with the same magnitude and frequency as theright coil 203, such that magnetic fields generated by theleft coil 202 and theright coil 203 reinforce each other in the area between thecoils magnetic field 503 for reading an RFID tag, in the area between thecoils - The shape and length of the
coils antenna apparatus 1 and the location of the identification device. While the magnetic field is concentrated within the boundaries of theantenna apparatus 1, the field will extend beyond the boundaries. Theleft coil 202 and theright coil 203 create a field which covers the height of the head of an animal passing through theantenna apparatus 1, but as the animal can place its head at a range of heights as it travels through theantenna apparatus 1, the field is made large enough to cover this movement accounting for different sized mature and juvenile animals. - The space in which an RFID tag can be read in is called the
read zone 503. When two or more RFID tags enter or are present in the read zone simultaneously, read errors can occur. Typically, RFID tags are attached through the ears of each animal. Thus in prior art readers with vertical orientation, multiple animals are sometimes able to jamb their heads in the reader at the same time and cause a read error. - In order to avoid this, the
angled panels angled panels side panels - As the head of a sheep is approximately 20 centimetres in front of the feet, the
left side panels angled panels Figure 4 . Theangled panels side panels - While in general the identification device may be on the animal's ear (e.g. an RFID ear tag), the
antenna apparatus 1 may be reconfigured for other locations on the animal. For example if the identification device is lower on the animal theside panels angled panels - The
angled panels - The "U" shape may also be described as a "V" shape or a truncated "V" shape or a frustoconical shape.
- The
antenna apparatus 1 may be manufactured as shown inFigures 6 and7 . A method of manufacturing 601 includes forming 602 a plastic blank 702. Then the electrical coils are wound 603 around formers in the plastic blank 702. The plastic blank 702 is then shaped 604. The shaped structure is then electrically connected to thecontroller 2 and packaged 605. - The forming 602 may relate to milling a flat
plastic block 701 into a desired shape and profile features in order to create the plastic blank 702 shown inFigure 7 . Alternatively manufacturing techniques such as injection moulding, 3D printing, or fabrication may be used according to the requirements of the application. The plastic blank 702 may be constructed in sections which are then adhered or bonded together. - The plastic blank 702 may be polyvinyl chloride (PVC) plastic, with a thickness of 15-21mm. Thicknesses outside this range may also be used, however the panels of the plastic blank 702 should be strong enough to withstand animal hoofs walking on them. Other construction materials may be used, including other types of plastics and timber. Milling may be performed using a computer numerical control (CNC) router. Several offset or opposed plastic blanks may be milled from a single sheet of material, in order to reduce wastage from
offcuts 703. The plastic blank 702 may be made with ahoneycomb structure 704 to reduce the weight of the resultingreader 2 by around 30%. The colour of the plastic blank 702 may be chosen to camouflage against the surroundings of thestock race 301. For example grey might be used to match in with concrete floors. As the floors of thestock race 301 gets dirty, so will theantenna apparatus 1. This camouflaging helps to reduce the chance of animals baulking as they approach thereader 2. Camouflaged anti-slip floor tape can be used when thereader 2 is on a dirt floor. Alternately, the bottom of thereader 2 may be slightly buried within the floors of thestock race 301 by a few centimetres. - Winding 603 may involve winding or securing the
left coil 202 inleft coil groove 705, and winding or securing theright coil 203 inright coil groove 706. Thecoils coils reader 2 stays within the specification of the TX/RX input stage of thecontroller 3 in order to provide adequate impedance matching. The resistance of thecoils reader 2. Thecoils coils coils - Shaping 604 may involve bending at various places in the plastic blank 702 to create the U shape. The bend lines 707 are heated at around 120°C for around 15-30 minutes prior to bending. An electronic strip heater, a hot air strip heater or a gas heater may be used for heating. The bend lines 707 are then folded in the desired shape using a jig on which the plastic blank 702 is placed when it is hot enough to bend. Pressure is applied to the hot plastic in order to bend it to the desired angle, and held until the piece is cooled to below 50°C. Water or wet cooling rags may be used to speed up the cooling process. As shown by
bend lines 707 inFigure 7 , four lateral bends are made in the substantially flat structure. By maintaining accurate temperature control and even temperature distribution, burning and spotting of the piece may be avoided. - Connecting and
packaging 605 may involve bonding a cover over thecoils 202, 203 (this may also be done prior to forming). It may include terminating thecoils controller 3. A box may be attached to the outside of thereader 2 to accommodate additional reader electronics. Thecoils reader 2. Alternately, coil winding leads may exit a panel and be attached to an electrical plug. The coil winding leads may be protected by a conduit or a flexible tube. The bonding process ensures that theantenna apparatus 1 is sealed and water resistant eg: IP56 rated. During bonding, the pieces of plastic being bonded may be plasticized and then completely mixed together in order to bond entirely. Silicon may be used around connectors to ensure there is no water ingress around cable entry points. Theantenna apparatus 1 may be able to be chemically treated by disinfectant for bio-security purposes. - The
controller 3 may be connected to a 12V power supply, such as a vehicle lead acid battery. The controller may be mounted to the stock races 301, 401 using screws or a supplied bracket. Theantenna apparatus 1 may be an active reader and may use thecoils - Due to the shape of the
antenna apparatus 1 it may be easy to install into a standard non-metallic sheep race. By using thesame reader interface 4 as presently available controllers use, installation is further simplified. - The
antenna apparatus 1 may also have a standard serial I/O port as part of the additional interfaces 6. This may use open source protocols to promote integration with various software packages andadditional devices 5, such as scales and data loggers. - To ensure that the impedance of the
reader 2 is sufficiently matched with thecontroller 3, thereader 2 may be wound and/or tuned according to a winding specification. Thereader 2 may have an impedance of 100 µH to 120 µH, or between 200 µH and 980 µH depending on thecontroller 3 used.
Claims (13)
- An apparatus (1) comprising:a structure configured to mount within a stock race (301) to permit animals to pass therethrough, wherein the structure has an open top;two antenna coils (202, 203) attached to or within the structure configured to provide a magnetic field (501) laterally across the structure, substantially in a zone through which an interrogatable identification device attached to each animal will pass; anda controller (3) configured to receive an identification signal for each animal passing through the magnetic field (501) based on an interrogation of each identification device passing therethrough;wherein the two coils (202, 203) comprise a coil attached to or within each side of the structure connected in a Helmholtz configuration.
- The apparatus in claim 1 wherein the structure comprises a base panel (204), angled panels (205, 206) extending from the base panel (204) and side panels (207, 208) extending from the angled panels and wherein the base panel, angled panels and side panels form a U, V, truncated V, or frustoconical shaped viewed from the front.
- The apparatus in claim 2 wherein the shape is configured to ensure that the animals pass though the structure in single file.
- The apparatus in claim 2 or 3 wherein the angled panel (205, 206) is angled at between 20° and 60° to the vertical viewed from the front.
- The apparatus in any one of claims 1 to 4 wherein the base panel (204), angled panels (205, 206) and side panels (207, 208) are slanted viewed from the side.
- The apparatus in claim 5 wherein the slant is configured to ensure that at least one of the animal's feet are within the structure before the identification device passes through the magnetic field (507).
- The apparatus in claim 5 or 6 wherein the side panels (207, 208) are angled at between 20° and 60° from the vertical viewed from the side.
- The apparatus in any preceding claim wherein the structure is configured to be substantially camouflaged with the stock race.
- The apparatus in any preceding claim wherein the structure comprises a honeycomb plastic.
- A method of manufacturing the apparatus of claim 1 comprising:forming a flat structure,providing electromagnetic coils (202, 203) in the structure, andshaping the structure into a U, V, truncated V or frustoconical 3D shape.
- The method in claim 10 wherein the forming comprises milling a plastic blank into a predetermined configuration.
- The method in claim 10 or 11 where providing coils (202, 203) comprises winding an electrical conductor onto the structure.
- The method in any of claims 10 to 12 wherein the shaping comprises heating portions of the structure and bending it into the 3D shape.
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AU2015901626A AU2015901626A0 (en) | 2015-05-06 | Antenna apparatus | |
PCT/AU2016/050317 WO2016176728A1 (en) | 2015-05-06 | 2016-05-02 | Antenna apparatus |
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EP3291669A1 EP3291669A1 (en) | 2018-03-14 |
EP3291669A4 EP3291669A4 (en) | 2018-05-30 |
EP3291669B1 true EP3291669B1 (en) | 2020-12-23 |
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EP16788954.2A Active EP3291669B1 (en) | 2015-05-06 | 2016-05-02 | Antenna apparatus |
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EP (1) | EP3291669B1 (en) |
JP (1) | JP2018522577A (en) |
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WO2015145422A1 (en) | 2014-03-26 | 2015-10-01 | Scr Engineers Ltd | Livestock location system |
US10986817B2 (en) | 2014-09-05 | 2021-04-27 | Intervet Inc. | Method and system for tracking health in animal populations |
US11071279B2 (en) | 2014-09-05 | 2021-07-27 | Intervet Inc. | Method and system for tracking health in animal populations |
CN107708410A (en) | 2015-05-06 | 2018-02-16 | 亚历斯有限公司 | Antenna equipment |
CA3077326A1 (en) | 2016-09-28 | 2018-04-05 | S.C.R. (Engineers) Limited | Holder for a smart monitoring tag for cows |
WO2019209712A1 (en) | 2018-04-22 | 2019-10-31 | Vence, Corp. | Livestock management system and method |
CN116548315A (en) | 2018-10-10 | 2023-08-08 | 世亚工程设备有限公司 | Method and device for drying milk of livestock |
EP3921762A4 (en) * | 2019-02-08 | 2022-10-12 | Allflex Australia Pty Ltd | Electronic animal tag reader |
USD990063S1 (en) | 2020-06-18 | 2023-06-20 | S.C.R. (Engineers) Limited | Animal ear tag |
IL275518B (en) | 2020-06-18 | 2021-10-31 | Scr Eng Ltd | An animal tag |
USD990062S1 (en) | 2020-06-18 | 2023-06-20 | S.C.R. (Engineers) Limited | Animal ear tag |
IL302630A (en) | 2020-11-25 | 2023-07-01 | Identigen Ltd | A system and method for tracing members of an animal population |
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DE10221484B4 (en) * | 2002-05-15 | 2012-10-11 | Hans-Joachim Laue | Device for powering a data acquisition and data transfer unit and data acquisition and transfer unit |
GB0221887D0 (en) * | 2002-09-20 | 2002-10-30 | Shearwell Data Ltd | Detection and identification of animals |
WO2007033407A1 (en) | 2005-09-20 | 2007-03-29 | Allflex Australia Pty. Limited | Portal antenna |
ES2556358T3 (en) | 2009-03-23 | 2016-01-15 | Satyatek Sa | System and procedure for reading one or more RFID tags in a metal case with an anti-collision protocol |
US8169324B2 (en) | 2009-05-20 | 2012-05-01 | Kuzniar James | System for tracking objects |
DE102010043394A1 (en) * | 2010-11-04 | 2012-05-10 | Fraunhofer Portugal Research | Mobile device and infrastructure system |
CN107708410A (en) | 2015-05-06 | 2018-02-16 | 亚历斯有限公司 | Antenna equipment |
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2016
- 2016-05-02 CN CN201680026441.6A patent/CN107708410A/en active Pending
- 2016-05-02 MX MX2017014052A patent/MX2017014052A/en unknown
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EP3291669A4 (en) | 2018-05-30 |
CN107708410A (en) | 2018-02-16 |
ZA201707327B (en) | 2023-12-20 |
JP2018522577A (en) | 2018-08-16 |
ES2856828T3 (en) | 2021-09-28 |
EP3291669A1 (en) | 2018-03-14 |
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